The invention relates to vinyl modified star-shaped polycarbonate and a method for synthesizing the same. The method includes carrying out ring-opening polymerization reaction on polyol and cyclic carbonate ester monomers under catalytic effects of stannous octanoate to obtain star-shaped polycarbonate high polymer materials; carrying out end-group modification on star-shaped polycarbonate to obtain the vinyl modified star-shaped polycarbonate. The polyol and the cyclic carbonate ester monomers are used as raw materials for the vinyl modified star-shaped polycarbonate. The vinyl modified star-shaped polycarbonate and the method have the advantage that the vinyl modified star-shaped polycarbonate synthesized by the aid of the method can be used in the field of photo-curing stereoscopic modeling and fused deposition modeling addition material manufacturing.